The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 30, 2021
Filed:
Apr. 03, 2020
Canon Kabushiki Kaisha, Tokyo, JP;
Daisuke Nagao, Kawaguchi, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
An image forming apparatus can prevent generation of correction data without setting a proper test original. A mat is closed for pressing an original on a platen. An opening/closing sensor detects a closed state and an open state of the mat. A density correction section corrects image data based on a correction condition. A printer forms an image based on the image data. A CPU controls the printer to form a pattern on a sheet, controls a CCD sensor to acquire read data concerning an image of the original according to user instruction for the CCD sensor to read the original, and generates the correction condition based on the read data. When the user instruction is given, if the open state of the mat is not changed to the closed state, the CPU displays a screen prompting the user to place the sheet on the platen.